Work

Spectrum of light hexaquark states in a triquark-antitriquark configuration

Year: 2026

Type: article

Abstract: To understand the nature of X ( 2075 ) and X ( 2085 ) observed by the BESIII Collaboration in the p Λ ¯ system, we systematically investigate the possibility that these states are compact hexaquark with triquark-antitriquark configurations for the first time. Within the framework of QCD sum rules, the mass spectrum and decay constants of such hexaquark states with quantum numbers J P = 0 − , 0 + , 1 − , 1 + are studied. Consequently, six independent and nondegenerate hexaquark candidates are obtained, among which two J P = 1 − states exhibit masses consistent with X ( 2075 ) , while the two J P = 1 + states differ markedly from the mass of X ( 2075 ) or X ( 2085 ) . The remaining two states with J P = 0 + and 0 − may serve as predictions for potential compact hexaquark configurations. Furthermore, the possible decay modes of these hexaquark states are analyzed, which could be the experimental signatures for their identification.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/csnt-5mkc

Authors: Xuan-Heng Zhang, Sheng-Qi Zhang, Cong-Feng Qiao

Institutions: University of Chinese Academy of Sciences, Peking University, International Centre for Theoretical Physics Asia-Pacific

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China